GNU bug report logs - #22533
Non-determinism in python-3 ".pyc" bytecode

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Package: guix;

Reported by: Leo Famulari <leo <at> famulari.name>

Date: Tue, 2 Feb 2016 05:17:02 UTC

Severity: important

Done: Ricardo Wurmus <rekado <at> elephly.net>

Bug is archived. No further changes may be made.

Full log

Message #76 received at 22533 <at> debbugs.gnu.org (full text, mbox):

From: Ricardo Wurmus <rekado <at> elephly.net>
To: Marius Bakke <mbakke <at> fastmail.com>
Cc: Gábor Boskovits <boskovits <at> gmail.com>,
 22533 <at> debbugs.gnu.org
Subject: Re: bug#22533: Python bytecode reproducibility
Date: Tue, 06 Mar 2018 15:43:11 +0100

Ricardo Wurmus <rekado <at> elephly.net> writes:

> Marius Bakke <mbakke <at> fastmail.com> writes:
>
>> I suppose we'll have to set PYTHONHASHSEED somewhere in
>> python-build-system as well.  Did you check if that makes a difference
>> for numpy?  Perhaps it's enough to set it if we add an auto-compilation
>> step?
>
> Right, I’m going to test this with numpy now.  Thanks for the hint!

It did help with one file, which is now built reproducibly, namely

  lib/python3.6/site-packages/numpy/testing/nose_tools/__pycache__/utils.cpython-36.pyc

This leaves five files in numpy that shouldn’t be but unfortunately are
different.

--
Ricardo

GPG: BCA6 89B6 3655 3801 C3C6  2150 197A 5888 235F ACAC
https://elephly.net
This bug report was last modified 6 years and 106 days ago.

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